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Industrial Engines > Model #8.1L GM

GM 8.1L Industrial Engine

These are brand new General Motors Vortec 8.1 liter industrial engines. They work in the generators and irrigation pumps and come complete as shown. Engine parts such as engine blocks, crankshafts and cylinder heads are readily available as well.
Industrial Engine Pictures Overview

General Motors 8.1 Liter Vortec Industrial Engine front view


$7995.00 TO $10,995.00
8.1L GM
Description Coil-near-plug ignition includes crankshaft sensor, camshaft sensor, ESC sensors, and eight ignition coils.

Cylinder head features high-flow replicated ports and sintered powder metal exhaust valve seat inserts for durability. Industrial torsional damper with integral six-rib pulley to accommodate serpentine accessory drive hardware.

Iron exhaust valve seat facing for better valve durability with alternative fuel applications. Platinum tip long-life spark plugs.

High torque camshaft with hydraulic roller valve lifters provides maximum performance. Positive Crankcase Ventilation (PCV) system is integral to intake manifold (no valve required).

Coated cast aluminum 8-quart oil pan with full baffle and 12-mm drain plugs on port and starboard sides.

Industrial external water crossover. Coated, flat top hypereutectic cast aluminum pistons.

Engine block quick-connect oil fittings for easy assembly of oil coolers or remote oil systems.

General Data

Type 90° 8.1L V8
Displacement 496 cid (8127 cc)
Compression Ratio 9.1:1
Valve Config Pushrod
Actuated Overhead Canted Valves
Manufactured Tonawanda, New York
Valve Lifters Hydraulic Roller
Bore x Stroke 4.25 x 4.37 in (107.95
mm x 111 mm)
Main Bearing Caps 4-Bolt Cast Iron
Balance Method Internal
Intake Manifold Factory-Installed
Alternate Fuel Manifold
Fuel Delivery LPG/NG Mixer
Oil Pan Capacity 8 qt
Fuel Types NG, LPG
Engine Rotation Clockwise (from the front)
Paint Protection Component Painted
Horsepower 264 hp @ 3000 rpm
(Propane), 240 hp @ 3000 rpm
(Natural Gas)
Torque 462 lb-ft @ 3000 rpm
(Propane), 417 lb-ft @ 3000 rpm
(Natural Gas)
Shipping Weight 729 lb (307.49 kg)

Block Cast Iron
Cylinder Head Cast Iron
Intake Manifold One Piece Cast Aluminum
Crankshaft High-Density Nodular
Iron(with undercut and rolled fillets)
Pistons Hypereutectic Cast
Exhaust Seat Sintered powder metal
exhaust valve seat inserts
Gaskets Non-Asbestos
Engine Sealing System
One-piece viton rear main seal
One-piece oil pan gasket
Molded rocker cover seal
Composite graphite cylinder head
gaskets with stainless steel core.
Switch & Sender Water Temp &
Oil Pressure
Fuel System Options
Closed-Loop Fuel System Kit
Dual Fuel
LPG (Mixer, Throttle Body, Fuel Lock,
LPG W/Governor (Same As Above
w/Elec. Governor)
LPG Carb
NG/LPG Carb Dual Fuel
NG Carb
NG (Mixer, Throttle Body & Air
NG W/Governor (Same As Above
w/Elec. Governor)
Three Way Catalyst Available

(Correction to SAE J1995. Actual power levels
may vary depending on OEM calibration and